For what it's worth, there is a much simpler (and uglier) mobile layout at mobile.appdiem.com (or m.appdiem.com, as soon as DNS catches up) currently -- I just haven't yet implemented user-agent detection.
If I go left of the grid, I'll probably use a vertical indicator, instead of horizontal.
If I go left of the grid, I'll probably use a vertical indicator, instead of horizontal.